EP0221797A1 - Verfahren zum Zünden des Erzbettes beim Sintern - Google Patents

Verfahren zum Zünden des Erzbettes beim Sintern Download PDF

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Publication number
EP0221797A1
EP0221797A1 EP86402124A EP86402124A EP0221797A1 EP 0221797 A1 EP0221797 A1 EP 0221797A1 EP 86402124 A EP86402124 A EP 86402124A EP 86402124 A EP86402124 A EP 86402124A EP 0221797 A1 EP0221797 A1 EP 0221797A1
Authority
EP
European Patent Office
Prior art keywords
burners
bed
ore
agglomerated
ignition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP86402124A
Other languages
English (en)
French (fr)
Inventor
Henri Hazard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fives Stein SA
Original Assignee
Stein Heurtey SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stein Heurtey SA filed Critical Stein Heurtey SA
Publication of EP0221797A1 publication Critical patent/EP0221797A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/125—Radiant burners heating a wall surface to incandescence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/06—Endless-strand sintering machines

Definitions

  • the present invention relates to a method of lighting a bed of ore with a view to its agglomeration. It is known that this operation consists in hot sintering a mixture of solid fuel and ore, for example coke dust and iron ore, with a view to agglomeration of the latter, to enable it to resist the crushing in blast furnace charges.
  • the industrial installation usually comprises a continuous grid moving slowly horizontally under an oven called an ignition hood.
  • the purpose of the ignition produced by the hood is to bring the upper part of the mixture to be agglomerated to a temperature sufficient to maintain its combustion. Thanks to a suction carried out under the grid, this reaction makes it possible to obtain the drying, the dehydration and the decarbonation of the lower part of this layer.
  • the height of the vault is of the order of one meter and does not drop below 700mm.
  • the burners have been placed at a fixed altitude and are adjusted to heat the atmosphere of the oven, whose roof radiates to heat the slowly moving layer.
  • the lower faces of the burners are brought to temperature to radiate on the bed to be agglomerated, thus creating an ignition vessel.
  • the installation shown in the Figures comprises for example three rows of burners, each supplied for example by a natural gas collector lla, llb, llc, a steel gas collector'12a, 12b, 12c, and a collector air 13a, 13b, 13c, connected to distribution pipes 11, 12, 13.
  • a natural gas collector lla, llb, llc a steel gas collector'12a, 12b, 12c
  • a collector air 13a, 13b, 13c connected to distribution pipes 11, 12, 13.
  • one of the collectors can act as a support beam and have an appropriate section, for example square (12a, 12b, 12c).
  • This beam, to which the burners 15 are fixed on each row is supported by screw jacks 16, 16 'which allow the altitude of all the burners to be adjusted simultaneously.
  • the cylinders are supported on the frame of the hood.
  • Manholes 17 are provided through the refractory 18 to allow observation and monitoring of the operation of the burners.
  • each burner forms a rectangular block 21 with a rectangular or square section
  • the lower face 21a constitutes a radiation surface.
  • This face 21a is brought to temperature to radiate on the bed to be agglomerated, thus creating an ignition vessel.
  • the geometry of this radiating face can be concave, with the core of the flame placed in the optical center. If necessary, this face can be heated by small auxiliary burners.
  • the blocks 21 are arranged against each other, to form a continuous line.
  • the lower faces 21a of the burners are placed projecting from the lower surface 23 of the hood vault (taking account of a possible vertical movement for adjusting the position of the burner flames: depending on the setting, they may be at the level or slightly behind).
  • the lower face 21a of the burners is located at a distance of between approximately 20 and 30 cm above the layer to be agglomerated (instead of 70 to 100 according to conventional methods). This short distance allows in particular the heating of the bed to be agglomerated by radiation from the underside of the burners.
  • a temperature sensor 25 has been indicated.
  • FIG 4 shows schematically a burner 15 inclined at an angle a on the vertical, to be oriented towards the material to be agglomerated which approaches it, as indicated by the arrow F in this Figure.
  • the angle a will advantageously be between 0 and 30 °.
  • the burner is adjustable by means of a ball-and-socket system 26 housed in the refractory 18 of the ignition hood.
  • the burner has a fuel inlet 27 and an air inlet 28. Its underside 21a is at a height L (20 to 30 cm) above the agglomerated bed 29.
  • the point of the dart 31 of the flame is established on the bed to define a circular or elliptical section of dimension S, such that the sections of two adjacent burners overlap at their edges.
  • the burners can go up or down, and low move in the plane of movement of the bed.
  • the aim is to obtain the optimum impact of the burner darts to ensure the most perfect possible combustion of the upper face of the bed, by reducing parasitic heat losses towards the atmosphere of the oven laboratory and the walls.
  • the mechanical adjustments can be controlled automatically according to various parameters, such as the speed of the bed, the height of the layer, the nature of the ore and the fuel used.
  • the burners bring the reaction oxygen into the layer by the air which is heated during its passage through the burners.
  • the excess air can be adjusted to a value of 45 to 50%, for example of the amount necessary for complete combustion of fuel injected by the burners.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP86402124A 1985-09-30 1986-09-29 Verfahren zum Zünden des Erzbettes beim Sintern Withdrawn EP0221797A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8514700 1985-09-30
FR8514700A FR2588069B1 (fr) 1985-09-30 1985-09-30 Procede d'allumage d'un lit de minerai en vue de son agglomeration

Publications (1)

Publication Number Publication Date
EP0221797A1 true EP0221797A1 (de) 1987-05-13

Family

ID=9323518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402124A Withdrawn EP0221797A1 (de) 1985-09-30 1986-09-29 Verfahren zum Zünden des Erzbettes beim Sintern

Country Status (2)

Country Link
EP (1) EP0221797A1 (de)
FR (1) FR2588069B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670801A1 (fr) * 1990-12-20 1992-06-26 Lorraine Laminage Dispositif d'allumage d'un lit de melange de materiaux tels que du minerai et du coke.
FR2693260A1 (fr) * 1991-03-26 1994-01-07 Samancor Ltd Procédé d'inflammation par rayons infrarouges pour le frittage des minerais.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR482875A (fr) * 1916-09-13 1917-05-02 Metallurg Company Of America Perfectionnements apportés aux fours à ignition pour appareils de grillage
FR1279384A (fr) * 1960-11-08 1961-12-22 Prod Refractaires Soc Gen De Procédé de chauffage de fours industriels et brûleur à gaz
GB914919A (en) * 1959-12-23 1963-01-09 Basse Sambre Sa Etudes Rech S Improvements in and relating to ore sintering machines
EP0036609A1 (de) * 1980-03-21 1981-09-30 Ruhrgas Aktiengesellschaft Verfahren und Vorrichtung zum Zünden eines Sintergemisches
EP0126948A1 (de) * 1983-04-28 1984-12-05 Kawasaki Steel Corporation Brenner für Sintermaschinen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1932409A (en) * 1931-03-25 1933-10-31 Reed W Hyde Apparatus for heat treating materials

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR482875A (fr) * 1916-09-13 1917-05-02 Metallurg Company Of America Perfectionnements apportés aux fours à ignition pour appareils de grillage
GB914919A (en) * 1959-12-23 1963-01-09 Basse Sambre Sa Etudes Rech S Improvements in and relating to ore sintering machines
FR1279384A (fr) * 1960-11-08 1961-12-22 Prod Refractaires Soc Gen De Procédé de chauffage de fours industriels et brûleur à gaz
EP0036609A1 (de) * 1980-03-21 1981-09-30 Ruhrgas Aktiengesellschaft Verfahren und Vorrichtung zum Zünden eines Sintergemisches
EP0126948A1 (de) * 1983-04-28 1984-12-05 Kawasaki Steel Corporation Brenner für Sintermaschinen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670801A1 (fr) * 1990-12-20 1992-06-26 Lorraine Laminage Dispositif d'allumage d'un lit de melange de materiaux tels que du minerai et du coke.
EP0493994A1 (de) * 1990-12-20 1992-07-08 Sollac Einrichtung zum Zünden eines Bettes aus Mischwerkstoffen, wie z.B. Erz und Koks
US5257804A (en) * 1990-12-20 1993-11-02 Sollac Device for igniting a bed of a mixture of materials such as ore and coke
FR2693260A1 (fr) * 1991-03-26 1994-01-07 Samancor Ltd Procédé d'inflammation par rayons infrarouges pour le frittage des minerais.

Also Published As

Publication number Publication date
FR2588069B1 (fr) 1989-08-25
FR2588069A1 (fr) 1987-04-03

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Inventor name: HAZARD, HENRI